Grand Lake, Colorado Weather
Monsoon storms drench the south. Day 15 of summer. Read this microseason across nine climate regions →
Grand Lake weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——81°55°—
- MondayJul 6Overcast12%—83°58°+2°
- TuesdayJul 7Light Drizzle60%—82°52°-1°
- WednesdayJul 8Light Drizzle50%0.02″81°52°-1°
- ThursdayJul 9Overcast43%—82°49°+1°
- FridayJul 10Overcast15%—83°50°+1°
- SaturdayJul 11Overcast——90°51°+7°
AQI 48 (Good), driven by Ozone. AQI down 32 over the last 6 hours — air quality is improving sharply. Ozone at AQI 31 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 14 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 31 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 14 around 1 PM.
- Present
- AQI 31
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 14
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:22 PM
- Moonset
- 11:18 AM
- In sign
- ♓︎ Pisces
Monsoon storms drench the south
Grand Lake at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 80447
15-Day Forecast — Grand Lake
- Sun81°55°7%
- Mon83°58°12%
- Tue82°52°60%
- Wed81°52°50%
- Thu82°49°43%
- Fri83°50°15%
- Sat90°51°5%
- Sun90°52°8%
- Mon91°55°12%
- Tue92°57°31%
- Wed91°53°48%
- Thu83°54°61%
- Fri86°55°61%
- Sat89°55°48%
- Sun85°55°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Grand Lake
SPC includes Grand Lake in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Grand Lake
- 80447